| 摘要 |
<p>PURPOSE:To enable a main body in a detecting state to be remote-controlled for changes in the condition of detecting objects. CONSTITUTION:A handy terminal 2 receives, pulse light of a LED 12 of a main body 1 and outputs command signals as photosignals at timing different from that of its photoreception signals. The main body 1 discriminates photoreception signals from a photoreception circuit 3 as photoreception signals for object detection and command signals by means of a discrimination circuit 5 and changes the amplification degree of an amplification circuit 6 by means of a microcomputer 8 according to the command signals. This process enables changes in sensitivity of detecting objects in a state of detecting actions.</p> |
